The fourth episode of IS: Infinite Stratos 2 , titled "," originally aired in Japan on October 25, 2013. The English dubbed version was produced by Seraphim Digital and released in North America by Sentai Filmworks . Episode Summary
: The academy staff, including Chifuyu and Maya, examine a mysterious IS drone and find its core is not among the 467 confirmed cores, hinting at a larger looming threat. Where to Watch IS: Infinite Stratos 2 (Dub) Episode 4
: The episode highlights Tatenashi Sarashiki, the student council president known as the academy's strongest pilot. She showcases her unique ability to manipulate water using IS energy. The fourth episode of IS: Infinite Stratos 2
: The series was released on Blu-ray and DVD through Section23 Films . including Chifuyu and Maya